mirror of
https://github.com/n8n-io/n8n.git
synced 2024-11-10 14:44:05 -08:00
b03e358a12
* 👕 Enable `consistent-type-imports` for nodes-base
* 👕 Apply to nodes-base
* ⏪ Undo unrelated changes
* 🚚 Move to `.eslintrc.js` in nodes-base
* ⏪ Revert "Enable `consistent-type-imports` for nodes-base"
This reverts commit 529ad72b05.
* 👕 Fix severity
652 lines
19 KiB
TypeScript
652 lines
19 KiB
TypeScript
/* eslint-disable n8n-nodes-base/node-filename-against-convention */
|
|
import type { ITriggerFunctions } from 'n8n-core';
|
|
import type {
|
|
IBinaryData,
|
|
IBinaryKeyData,
|
|
ICredentialsDecrypted,
|
|
ICredentialTestFunctions,
|
|
IDataObject,
|
|
IDeferredPromise,
|
|
INodeCredentialTestResult,
|
|
INodeExecutionData,
|
|
INodeType,
|
|
INodeTypeBaseDescription,
|
|
INodeTypeDescription,
|
|
ITriggerResponse,
|
|
} from 'n8n-workflow';
|
|
import { createDeferredPromise, LoggerProxy as Logger, NodeOperationError } from 'n8n-workflow';
|
|
|
|
import type { ImapSimple, ImapSimpleOptions, Message } from 'imap-simple';
|
|
import { connect as imapConnect, getParts } from 'imap-simple';
|
|
import type { Source as ParserSource } from 'mailparser';
|
|
import { simpleParser } from 'mailparser';
|
|
|
|
import _ from 'lodash';
|
|
import type { ICredentialsDataImap } from '../../../credentials/Imap.credentials';
|
|
import { isCredentialsDataImap } from '../../../credentials/Imap.credentials';
|
|
|
|
export async function parseRawEmail(
|
|
this: ITriggerFunctions,
|
|
messageEncoded: ParserSource,
|
|
dataPropertyNameDownload: string,
|
|
): Promise<INodeExecutionData> {
|
|
const responseData = await simpleParser(messageEncoded);
|
|
const headers: IDataObject = {};
|
|
for (const header of responseData.headerLines) {
|
|
headers[header.key] = header.line;
|
|
}
|
|
|
|
// @ts-ignore
|
|
responseData.headers = headers;
|
|
// @ts-ignore
|
|
responseData.headerLines = undefined;
|
|
|
|
const binaryData: IBinaryKeyData = {};
|
|
if (responseData.attachments) {
|
|
for (let i = 0; i < responseData.attachments.length; i++) {
|
|
const attachment = responseData.attachments[i];
|
|
binaryData[`${dataPropertyNameDownload}${i}`] = await this.helpers.prepareBinaryData(
|
|
attachment.content,
|
|
attachment.filename,
|
|
attachment.contentType,
|
|
);
|
|
}
|
|
// @ts-ignore
|
|
responseData.attachments = undefined;
|
|
}
|
|
|
|
return {
|
|
json: responseData as unknown as IDataObject,
|
|
binary: Object.keys(binaryData).length ? binaryData : undefined,
|
|
} as INodeExecutionData;
|
|
}
|
|
|
|
const versionDescription: INodeTypeDescription = {
|
|
displayName: 'Email Trigger (IMAP)',
|
|
name: 'emailReadImap',
|
|
icon: 'fa:inbox',
|
|
group: ['trigger'],
|
|
version: 2,
|
|
description: 'Triggers the workflow when a new email is received',
|
|
eventTriggerDescription: 'Waiting for you to receive an email',
|
|
defaults: {
|
|
name: 'Email Trigger (IMAP)',
|
|
color: '#44AA22',
|
|
},
|
|
// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
|
|
inputs: [],
|
|
outputs: ['main'],
|
|
credentials: [
|
|
{
|
|
name: 'imap',
|
|
required: true,
|
|
testedBy: 'imapConnectionTest',
|
|
},
|
|
],
|
|
properties: [
|
|
{
|
|
displayName: 'Mailbox Name',
|
|
name: 'mailbox',
|
|
type: 'string',
|
|
default: 'INBOX',
|
|
},
|
|
{
|
|
displayName: 'Action',
|
|
name: 'postProcessAction',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
name: 'Mark as Read',
|
|
value: 'read',
|
|
},
|
|
{
|
|
name: 'Nothing',
|
|
value: 'nothing',
|
|
},
|
|
],
|
|
default: 'read',
|
|
description:
|
|
'What to do after the email has been received. If "nothing" gets selected it will be processed multiple times.',
|
|
},
|
|
{
|
|
displayName: 'Download Attachments',
|
|
name: 'downloadAttachments',
|
|
type: 'boolean',
|
|
default: false,
|
|
displayOptions: {
|
|
show: {
|
|
format: ['simple'],
|
|
},
|
|
},
|
|
description:
|
|
'Whether attachments of emails should be downloaded. Only set if needed as it increases processing.',
|
|
},
|
|
{
|
|
displayName: 'Format',
|
|
name: 'format',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
name: 'RAW',
|
|
value: 'raw',
|
|
description:
|
|
'Returns the full email message data with body content in the raw field as a base64url encoded string; the payload field is not used',
|
|
},
|
|
{
|
|
name: 'Resolved',
|
|
value: 'resolved',
|
|
description:
|
|
'Returns the full email with all data resolved and attachments saved as binary data',
|
|
},
|
|
{
|
|
name: 'Simple',
|
|
value: 'simple',
|
|
description:
|
|
'Returns the full email; do not use if you wish to gather inline attachments',
|
|
},
|
|
],
|
|
default: 'simple',
|
|
description: 'The format to return the message in',
|
|
},
|
|
{
|
|
displayName: 'Property Prefix Name',
|
|
name: 'dataPropertyAttachmentsPrefixName',
|
|
type: 'string',
|
|
default: 'attachment_',
|
|
displayOptions: {
|
|
show: {
|
|
format: ['resolved'],
|
|
},
|
|
},
|
|
description:
|
|
'Prefix for name of the binary property to which to write the attachments. An index starting with 0 will be added. So if name is "attachment_" the first attachment is saved to "attachment_0"',
|
|
},
|
|
{
|
|
displayName: 'Property Prefix Name',
|
|
name: 'dataPropertyAttachmentsPrefixName',
|
|
type: 'string',
|
|
default: 'attachment_',
|
|
displayOptions: {
|
|
show: {
|
|
format: ['simple'],
|
|
downloadAttachments: [true],
|
|
},
|
|
},
|
|
description:
|
|
'Prefix for name of the binary property to which to write the attachments. An index starting with 0 will be added. So if name is "attachment_" the first attachment is saved to "attachment_0"',
|
|
},
|
|
{
|
|
displayName: 'Options',
|
|
name: 'options',
|
|
type: 'collection',
|
|
placeholder: 'Add Option',
|
|
default: {},
|
|
options: [
|
|
{
|
|
displayName: 'Custom Email Rules',
|
|
name: 'customEmailConfig',
|
|
type: 'string',
|
|
default: '["UNSEEN"]',
|
|
description:
|
|
'Custom email fetching rules. See <a href="https://github.com/mscdex/node-imap">node-imap</a>\'s search function for more details.',
|
|
},
|
|
{
|
|
displayName: 'Force Reconnect Every Minutes',
|
|
name: 'forceReconnect',
|
|
type: 'number',
|
|
default: 60,
|
|
description: 'Sets an interval (in minutes) to force a reconnection',
|
|
},
|
|
],
|
|
},
|
|
],
|
|
};
|
|
|
|
export class EmailReadImapV2 implements INodeType {
|
|
description: INodeTypeDescription;
|
|
|
|
constructor(baseDescription: INodeTypeBaseDescription) {
|
|
this.description = {
|
|
...baseDescription,
|
|
...versionDescription,
|
|
};
|
|
}
|
|
|
|
methods = {
|
|
credentialTest: {
|
|
async imapConnectionTest(
|
|
this: ICredentialTestFunctions,
|
|
credential: ICredentialsDecrypted,
|
|
): Promise<INodeCredentialTestResult> {
|
|
if (isCredentialsDataImap(credential.data)) {
|
|
const credentials = credential.data as ICredentialsDataImap;
|
|
try {
|
|
const config: ImapSimpleOptions = {
|
|
imap: {
|
|
user: credentials.user,
|
|
password: credentials.password,
|
|
host: credentials.host,
|
|
port: credentials.port,
|
|
tls: credentials.secure,
|
|
authTimeout: 20000,
|
|
},
|
|
};
|
|
const tlsOptions: IDataObject = {};
|
|
|
|
if (credentials.allowUnauthorizedCerts) {
|
|
tlsOptions.rejectUnauthorized = false;
|
|
}
|
|
|
|
if (credentials.secure) {
|
|
tlsOptions.servername = credentials.host;
|
|
}
|
|
if (!_.isEmpty(tlsOptions)) {
|
|
config.imap.tlsOptions = tlsOptions;
|
|
}
|
|
const connection = await imapConnect(config);
|
|
await connection.getBoxes();
|
|
connection.end();
|
|
} catch (error) {
|
|
return {
|
|
status: 'Error',
|
|
message: error.message,
|
|
};
|
|
}
|
|
return {
|
|
status: 'OK',
|
|
message: 'Connection successful!',
|
|
};
|
|
} else {
|
|
return {
|
|
status: 'Error',
|
|
message: 'Credentials are no IMAP credentials.',
|
|
};
|
|
}
|
|
},
|
|
},
|
|
};
|
|
|
|
async trigger(this: ITriggerFunctions): Promise<ITriggerResponse> {
|
|
const credentialsObject = await this.getCredentials('imap');
|
|
const credentials = isCredentialsDataImap(credentialsObject) ? credentialsObject : undefined;
|
|
if (!credentials) {
|
|
throw new NodeOperationError(this.getNode(), 'Credentials are not valid for imap node.');
|
|
}
|
|
const mailbox = this.getNodeParameter('mailbox') as string;
|
|
const postProcessAction = this.getNodeParameter('postProcessAction') as string;
|
|
const options = this.getNodeParameter('options', {}) as IDataObject;
|
|
|
|
const staticData = this.getWorkflowStaticData('node');
|
|
Logger.debug('Loaded static data for node "EmailReadImap"', { staticData });
|
|
|
|
let connection: ImapSimple;
|
|
let closeFunctionWasCalled = false;
|
|
let isCurrentlyReconnecting = false;
|
|
|
|
// Returns the email text
|
|
|
|
const getText = async (parts: any[], message: Message, subtype: string) => {
|
|
if (!message.attributes.struct) {
|
|
return '';
|
|
}
|
|
|
|
const textParts = parts.filter((part) => {
|
|
return (
|
|
part.type.toUpperCase() === 'TEXT' && part.subtype.toUpperCase() === subtype.toUpperCase()
|
|
);
|
|
});
|
|
|
|
if (textParts.length === 0) {
|
|
return '';
|
|
}
|
|
|
|
try {
|
|
return await connection.getPartData(message, textParts[0]);
|
|
} catch {
|
|
return '';
|
|
}
|
|
};
|
|
|
|
// Returns the email attachments
|
|
const getAttachment = async (
|
|
imapConnection: ImapSimple,
|
|
parts: any[],
|
|
message: Message,
|
|
): Promise<IBinaryData[]> => {
|
|
if (!message.attributes.struct) {
|
|
return [];
|
|
}
|
|
|
|
// Check if the message has attachments and if so get them
|
|
const attachmentParts = parts.filter((part) => {
|
|
return part.disposition && part.disposition.type.toUpperCase() === 'ATTACHMENT';
|
|
});
|
|
|
|
const attachmentPromises = [];
|
|
let attachmentPromise;
|
|
for (const attachmentPart of attachmentParts) {
|
|
attachmentPromise = imapConnection
|
|
.getPartData(message, attachmentPart)
|
|
.then(async (partData) => {
|
|
// Return it in the format n8n expects
|
|
return this.helpers.prepareBinaryData(
|
|
partData,
|
|
attachmentPart.disposition.params.filename,
|
|
);
|
|
});
|
|
|
|
attachmentPromises.push(attachmentPromise);
|
|
}
|
|
|
|
return Promise.all(attachmentPromises);
|
|
};
|
|
|
|
// Returns all the new unseen messages
|
|
const getNewEmails = async (
|
|
imapConnection: ImapSimple,
|
|
searchCriteria: Array<string | string[]>,
|
|
): Promise<INodeExecutionData[]> => {
|
|
const format = this.getNodeParameter('format', 0) as string;
|
|
|
|
let fetchOptions = {};
|
|
|
|
if (format === 'simple' || format === 'raw') {
|
|
fetchOptions = {
|
|
bodies: ['TEXT', 'HEADER'],
|
|
markSeen: false,
|
|
struct: true,
|
|
};
|
|
} else if (format === 'resolved') {
|
|
fetchOptions = {
|
|
bodies: [''],
|
|
markSeen: false,
|
|
struct: true,
|
|
};
|
|
}
|
|
|
|
const results = await imapConnection.search(searchCriteria, fetchOptions);
|
|
|
|
const newEmails: INodeExecutionData[] = [];
|
|
let newEmail: INodeExecutionData, messageHeader, messageBody;
|
|
let attachments: IBinaryData[];
|
|
let propertyName: string;
|
|
|
|
// All properties get by default moved to metadata except the ones
|
|
// which are defined here which get set on the top level.
|
|
const topLevelProperties = ['cc', 'date', 'from', 'subject', 'to'];
|
|
|
|
if (format === 'resolved') {
|
|
const dataPropertyAttachmentsPrefixName = this.getNodeParameter(
|
|
'dataPropertyAttachmentsPrefixName',
|
|
) as string;
|
|
|
|
for (const message of results) {
|
|
if (
|
|
staticData.lastMessageUid !== undefined &&
|
|
message.attributes.uid <= (staticData.lastMessageUid as number)
|
|
) {
|
|
continue;
|
|
}
|
|
if (
|
|
staticData.lastMessageUid === undefined ||
|
|
(staticData.lastMessageUid as number) < message.attributes.uid
|
|
) {
|
|
staticData.lastMessageUid = message.attributes.uid;
|
|
}
|
|
const part = _.find(message.parts, { which: '' });
|
|
|
|
if (part === undefined) {
|
|
throw new NodeOperationError(this.getNode(), 'Email part could not be parsed.');
|
|
}
|
|
const parsedEmail = await parseRawEmail.call(
|
|
this,
|
|
part.body,
|
|
dataPropertyAttachmentsPrefixName,
|
|
);
|
|
|
|
newEmails.push(parsedEmail);
|
|
}
|
|
} else if (format === 'simple') {
|
|
const downloadAttachments = this.getNodeParameter('downloadAttachments') as boolean;
|
|
|
|
let dataPropertyAttachmentsPrefixName = '';
|
|
if (downloadAttachments) {
|
|
dataPropertyAttachmentsPrefixName = this.getNodeParameter(
|
|
'dataPropertyAttachmentsPrefixName',
|
|
) as string;
|
|
}
|
|
|
|
for (const message of results) {
|
|
if (
|
|
staticData.lastMessageUid !== undefined &&
|
|
message.attributes.uid <= (staticData.lastMessageUid as number)
|
|
) {
|
|
continue;
|
|
}
|
|
if (
|
|
staticData.lastMessageUid === undefined ||
|
|
(staticData.lastMessageUid as number) < message.attributes.uid
|
|
) {
|
|
staticData.lastMessageUid = message.attributes.uid;
|
|
}
|
|
const parts = getParts(message.attributes.struct!);
|
|
|
|
newEmail = {
|
|
json: {
|
|
textHtml: await getText(parts, message, 'html'),
|
|
textPlain: await getText(parts, message, 'plain'),
|
|
metadata: {} as IDataObject,
|
|
},
|
|
};
|
|
|
|
messageHeader = message.parts.filter((part) => {
|
|
return part.which === 'HEADER';
|
|
});
|
|
|
|
messageBody = messageHeader[0].body;
|
|
for (propertyName of Object.keys(messageBody)) {
|
|
if (messageBody[propertyName].length) {
|
|
if (topLevelProperties.includes(propertyName)) {
|
|
newEmail.json[propertyName] = messageBody[propertyName][0];
|
|
} else {
|
|
(newEmail.json.metadata as IDataObject)[propertyName] =
|
|
messageBody[propertyName][0];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (downloadAttachments) {
|
|
// Get attachments and add them if any get found
|
|
attachments = await getAttachment(imapConnection, parts, message);
|
|
if (attachments.length) {
|
|
newEmail.binary = {};
|
|
for (let i = 0; i < attachments.length; i++) {
|
|
newEmail.binary[`${dataPropertyAttachmentsPrefixName}${i}`] = attachments[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
newEmails.push(newEmail);
|
|
}
|
|
} else if (format === 'raw') {
|
|
for (const message of results) {
|
|
if (
|
|
staticData.lastMessageUid !== undefined &&
|
|
message.attributes.uid <= (staticData.lastMessageUid as number)
|
|
) {
|
|
continue;
|
|
}
|
|
if (
|
|
staticData.lastMessageUid === undefined ||
|
|
(staticData.lastMessageUid as number) < message.attributes.uid
|
|
) {
|
|
staticData.lastMessageUid = message.attributes.uid;
|
|
}
|
|
const part = _.find(message.parts, { which: 'TEXT' });
|
|
|
|
if (part === undefined) {
|
|
throw new NodeOperationError(this.getNode(), 'Email part could not be parsed.');
|
|
}
|
|
// Return base64 string
|
|
newEmail = {
|
|
json: {
|
|
raw: part.body,
|
|
},
|
|
};
|
|
|
|
newEmails.push(newEmail);
|
|
}
|
|
}
|
|
|
|
// only mark messages as seen once processing has finished
|
|
if (postProcessAction === 'read') {
|
|
const uidList = results.map((e) => e.attributes.uid);
|
|
if (uidList.length > 0) {
|
|
await imapConnection.addFlags(uidList, '\\SEEN');
|
|
}
|
|
}
|
|
return newEmails;
|
|
};
|
|
|
|
const returnedPromise: IDeferredPromise<void> | undefined = await createDeferredPromise();
|
|
|
|
const establishConnection = async (): Promise<ImapSimple> => {
|
|
let searchCriteria = ['UNSEEN'] as Array<string | string[]>;
|
|
if (options.customEmailConfig !== undefined) {
|
|
try {
|
|
searchCriteria = JSON.parse(options.customEmailConfig as string);
|
|
} catch (error) {
|
|
throw new NodeOperationError(this.getNode(), 'Custom email config is not valid JSON.');
|
|
}
|
|
}
|
|
|
|
const config: ImapSimpleOptions = {
|
|
imap: {
|
|
user: credentials.user,
|
|
password: credentials.password,
|
|
host: credentials.host,
|
|
port: credentials.port,
|
|
tls: credentials.secure,
|
|
authTimeout: 20000,
|
|
},
|
|
onmail: async () => {
|
|
if (connection) {
|
|
if (staticData.lastMessageUid !== undefined) {
|
|
searchCriteria.push(['UID', `${staticData.lastMessageUid as number}:*`]);
|
|
/**
|
|
* A short explanation about UIDs and how they work
|
|
* can be found here: https://dev.to/kehers/imap-new-messages-since-last-check-44gm
|
|
* TL;DR:
|
|
* - You cannot filter using ['UID', 'CURRENT ID + 1:*'] because IMAP
|
|
* won't return correct results if current id + 1 does not yet exist.
|
|
* - UIDs can change but this is not being treated here.
|
|
* If the mailbox is recreated (lets say you remove all emails, remove
|
|
* the mail box and create another with same name, UIDs will change)
|
|
* - You can check if UIDs changed in the above example
|
|
* by checking UIDValidity.
|
|
*/
|
|
Logger.debug('Querying for new messages on node "EmailReadImap"', { searchCriteria });
|
|
}
|
|
|
|
try {
|
|
const returnData = await getNewEmails(connection, searchCriteria);
|
|
if (returnData.length) {
|
|
this.emit([returnData]);
|
|
}
|
|
} catch (error) {
|
|
Logger.error('Email Read Imap node encountered an error fetching new emails', {
|
|
error,
|
|
});
|
|
// Wait with resolving till the returnedPromise got resolved, else n8n will be unhappy
|
|
// if it receives an error before the workflow got activated
|
|
await returnedPromise.promise().then(() => {
|
|
this.emitError(error as Error);
|
|
});
|
|
}
|
|
}
|
|
},
|
|
onupdate: async (seqno: number, info) => {
|
|
Logger.verbose(`Email Read Imap:update ${seqno}`, info);
|
|
},
|
|
};
|
|
|
|
const tlsOptions: IDataObject = {};
|
|
|
|
if (credentials.allowUnauthorizedCerts) {
|
|
tlsOptions.rejectUnauthorized = false;
|
|
}
|
|
|
|
if (credentials.secure) {
|
|
tlsOptions.servername = credentials.host;
|
|
}
|
|
|
|
if (!_.isEmpty(tlsOptions)) {
|
|
config.imap.tlsOptions = tlsOptions;
|
|
}
|
|
|
|
// Connect to the IMAP server and open the mailbox
|
|
// that we get informed whenever a new email arrives
|
|
return imapConnect(config).then(async (conn) => {
|
|
conn.on('close', async (_hadError: boolean) => {
|
|
if (isCurrentlyReconnecting) {
|
|
Logger.debug('Email Read Imap: Connected closed for forced reconnecting');
|
|
} else if (closeFunctionWasCalled) {
|
|
Logger.debug('Email Read Imap: Shutting down workflow - connected closed');
|
|
} else {
|
|
Logger.error('Email Read Imap: Connected closed unexpectedly');
|
|
this.emitError(new Error('Imap connection closed unexpectedly'));
|
|
}
|
|
});
|
|
conn.on('error', async (error) => {
|
|
const errorCode = error.code.toUpperCase();
|
|
Logger.verbose(`IMAP connection experienced an error: (${errorCode})`, { error });
|
|
// eslint-disable-next-line @typescript-eslint/no-use-before-define
|
|
await closeFunction();
|
|
this.emitError(error);
|
|
});
|
|
return conn;
|
|
});
|
|
};
|
|
|
|
connection = await establishConnection();
|
|
|
|
await connection.openBox(mailbox);
|
|
|
|
let reconnectionInterval: NodeJS.Timeout | undefined;
|
|
|
|
if (options.forceReconnect !== undefined) {
|
|
reconnectionInterval = setInterval(async () => {
|
|
Logger.verbose('Forcing reconnect to IMAP server');
|
|
try {
|
|
isCurrentlyReconnecting = true;
|
|
if (connection.closeBox) await connection.closeBox(false);
|
|
connection.end();
|
|
connection = await establishConnection();
|
|
await connection.openBox(mailbox);
|
|
} catch (error) {
|
|
Logger.error(error);
|
|
} finally {
|
|
isCurrentlyReconnecting = false;
|
|
}
|
|
}, (options.forceReconnect as number) * 1000 * 60);
|
|
}
|
|
|
|
// When workflow and so node gets set to inactive close the connectoin
|
|
async function closeFunction() {
|
|
closeFunctionWasCalled = true;
|
|
if (reconnectionInterval) {
|
|
clearInterval(reconnectionInterval);
|
|
}
|
|
if (connection.closeBox) await connection.closeBox(false);
|
|
connection.end();
|
|
}
|
|
|
|
// Resolve returned-promise so that waiting errors can be emitted
|
|
returnedPromise.resolve();
|
|
|
|
return {
|
|
closeFunction,
|
|
};
|
|
}
|
|
}
|